Ok, let's seperate them from their characters. Which artifact on the D&D cartoon was your favorite:
Hank's Bow: Lightning bolts, lassos, and pretty much anything that could be drawn with a line or two.
Bobby's Club: Midget Smash!
Presto's Hat: I know I left that battlecruiser around here somewhere...
Sheila's Cloak: Can't see me!
Eric's Shield: Nothing hurts me!
Diana's Staff: Look! My stick can get bigger!
The bow was cool, but not my favorite ... that staff seemed, of them all, the one that most explicitly boosted stats and abilities, rather than simply serving as an excellent medium/weapon. I found that fascinating, and it puts that one at the top of my list.
Unless Diana was supposed to have always had that freaky ability to leap and bound like a grasshopper doped up on mexican jumping beans. Maybe she was a cheerleader. I don't recall much of the series but the occasional flashes, colored rosy by nostalgia.
I like both the Cloak the Hat, with the cloak being the more useful.
the sheer neato and blasty power of the bow made it my favorite. then it could do the other things, and that solidified it for me.
I don't know about the show, really, but being invisible does it for me.
I'm almost invisible as it is, and I abuse it already.